#include<stdio.h>
int main()
#pragma warning(disable:4996)
{
	int a;
	int	b;
	int c;
	scanf("%f %d", &a, &b);
	c = (float)b / 100;
	c *= c;
	c = a / c;
	printf("%.2lf", c);
		return 0;
}
